How to monitor and get alert if mount point is not available anymore in Linux

[kazarkin]

Hello All,

Can't find an answer there.
So the question is how to monitor and get alert if mount point written in /etc/fstab is not available anymore in Linux.
For example there is VM, some disks are mounted and written in /etc/fstab, then somebody deleted VM disk in VMware. Of course it will cause losing moint point on Linux server.
So I would like to have monitoring of losing mount points in Linux.
Is there any way to do it?
If there is already an answer please provide me with the link.

[kyus]

Assuming you're using Zabbix 7.x and using the template "Linux by Zabbix agent":
I can't think of any specific item for this, but you can create a trigger prototype in your "Mounted filesystem discovery" discovery rule.

It can be: FS [{#FSNAME}]: Filesystem is not mounted
Using an expression: nodata(/Linux by Zabbix agent/vfs.fs.dependent[{#FSNAME},data],30m)=1

Note that this will trigger in case the item doesn't get any data, so if your host is unavailable it'll trigger, thus I suggest adding a dependency on this trigger (to some availability trigger).